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STP430 - DI-BSCCO: The Practical HTS Wire

DI-BSCCO:The practical HTS wire
Tomohiro Kagiyama1, Shin-ichi Kobayashi1, Kouhei Yamazaki1, Masashi Kikuchi1,
Takayoshi Nakashima1, Soichiro Takeda1, Kazuhiko Hayashi1,
Jun-ichi Shimoyama2, and Hitoshi Kitaguchi3
1Sumitomo Electric Industries, Ltd., Osaka, Japan
2Tokyo University, Tokyo, Japan
3National Institute for Materials Science, Tsukuba, Japan
Abstract - Sumitomo Electric has been commercially producing the silver-sheathed Bi2223 multi-filamentary wires, especially under the name of DI-BSCCO (Dynamically-Innovative BSCCO). DI-BSCCO wire is practically used in various applications, for example, cable, magnet, motor and so on. For the use of magnet application, HTS wire usually exposed to strong hoop stress. So the wire is needed to have high mechanical strength. For such a purpose we have the variety of DI-BSCCO called TypeHT-SS with 3ply structure to achieve high tensile strength. Though TypeHT-SS promises the critical tensile stress of 270 MPa, it is not enough to use in high field magnet. So we have been developing stronger wire called TypeHT-XX. In these days, its critical tensile stress has been raised up to nearly 500 MPa with keeping comparatively large Je. In this presentation, recent progress on DI-BSCCO especially in mechanical strength will be shown. Besides other R&D activities will also be reported.
Keywords (Index Terms) - Bi2223 HTS, DI-BSCCO superconducting wires, high mechanical strength.
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), January 2015.
Received December 16, 2014; Accepted December 16, 2014.  Reference STP430; Category 5.
This invited presentation WT-4-INV was given at the ISS 2014.